Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The arrival of September is marked by a minor reduction in average high-temperature, sliding from a moderately hot 79.5°F (26.4°C) in August to an agreeable 72.7°F (22.6°C). East Williston observes a consistent average low-temperature of 64.6°F (18.1°C) throughout September nights.Humidity
The average relative humidity in September in East Williston is 74%.Rainfall
In September, in East Williston, New York, the rain falls for 13.4 days. Throughout September, 2.6" (66mm) of precipitation is accumulated. Throughout the year, there are 158.5 rainfall days, and 36.38" (924mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall in East Williston.Daylight
In East Williston, New York, the average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:22 am and sunset at 7:26 pm. On the last day of September, sunrise is at 6:50 am and sunset at 6:37 pm EDT.
Sunshine
In East Williston, the average sunshine in September is 9.1h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: In September, a regular UV index of 5 translates into these guidelines:
Adopt protective measures - It is advised to guard against sun damage. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Frequently asked questions
What are the temperatures in East Williston in September?
What is the average humidity in September in East Williston?
How many days does it rain in September in East Williston?
When it does not snow in East Williston?
Does it snow in East Williston in September?
What is the average length of the day in September in East Williston?
When are sunrise and sunset in September in East Williston?
How long on average sun shines in September in East Williston?
How high is the UV index in September in East Williston?
Average temperature in September
East Williston, NY
- Average high temperature in September: 72.7°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (37.2°F).
- Average low temperature in September: 64.6°F
The months with the highest average low temperature are July and August (71.2°F).
The coldest month (with the lowest average low temperature) is January (28.6°F).
Average pressure in September
East Williston, NY
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
East Williston, NY
- Average wind speed in September: 9.2mph
The windiest month (with the highest average wind speed) is January (12.4mph).
The calmest month (with the lowest average wind speed) is July (8.1mph).
Average humidity in September
East Williston, NY
- Average humidity in September: 74%
The months with the highest relative humidity are May and June (76%).
The month with the lowest relative humidity is November (71%).
Average rainfall in September
East Williston, NY
- Average rainfall in September: 2.6"
The wettest month (with the highest rainfall) is July (4.13").
The driest month (with the least rainfall) is January (2.17").
Average rainfall days in September
East Williston, NY
- Average rainfall days in September: 13.4 days
The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is January (8 days).
Average snowfall in September
East Williston, NY
- Average snowfall in September: 0"
The month with the highest snowfall is March (1.85").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
East Williston, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
East Williston, NY
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
East Williston, NY
- Average sunshine days in September: 15 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (10.8 days).
Average UV index in September
East Williston, NY
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
East Williston, NY
- Average cloud cover in September: 32
The months with the most cloud cover are February and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
East Williston, NY
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
East Williston, New York, USA
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